Lug for traction-wheels.



J. F. STEWARD. LUG FOR TRACTION WHEELS. APPLIOATION FILED NOV. 8, 191a.

Pzitented Oct. 20, 1914.

Wheels,

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JOHN F. STEWARD, OF CHICAGO, ILLINOIS.

LUG r012 TRACTION-WHEELS.

Specification of Letters Patent.

Patented Oct. 20, 1914.

Substitute fer application Serial No. 684,501, filed April 23, 1912. This application filed November 8, 19.13.

- Serial No. 799,982.

To all whom it may concern V Be'it known that I, JOHN F-. STEWARD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain'new and useful Improvements in Lugs for Tractionof which the following is a full description, reference being bad to the accompanying drawings, in which Figure 1 represents a segment of the mm of .a traction wheel showing my lugs in the three positions which they are adapted .to

occupy relative thereto, at the will of the operator; Figs. 2, 3 and 4: aresectional end elevations of the same lugs, showing them in each of the three positions in which they may be placed upon the rim of the wheel.

The object of the invention is to provide a single lug thatmay have various degrees of aggressivenessupon the soil, either by conformation or by radial height, or in fact, both. Stated in the simplest terms, my lug may be considered as triangular, having a base, a perpendicular and a hypotenuse. The may be forged from angle iron, but I pre er to make them of malleable cast iron.

A may be considered to represent the lug as a whole, a the base of the triangle, a the perpendicular of the triangle, and a the hypotenuse of the triangle.

B represents a section of the rim of a traction. wheel, and (J one of the bolts adapted to secure the lugs to the rim of the wheel, preferably having the T-head c and the nut 0 Although the lugs may be treated as substantially triangular, variations therefrom may be made without departing from the invention, so long as multiple radial heights or multiple variations in aggressiveness are attained.

' The lugs are provided, preferably near their ends, with one or more bolt holes, but I have chosen to so adapt a single bolt hole for each bolt that will permit the lug to be placed in either of the three positions upon the rim of the Wheel to which it is adapted.

.Tu'rning'to Fig. 2, it will be seen that the hypotenuse, of the form I have considered preferable, lies upon the rim B of the wheel. The bolt being T-headed, the wings thereof, in effect, rest upon a part of each of what I have considered the base and the perpendicube seen by reference to 2 of lar of the triangle. The nut c tightly drawn, the bolt becomes competent to hold the lug in place. It is plain that a single common bolt'might be substituted and merely pass through the lug at the junction of the base and perpendicular, but by providing the specific construction of aperture for the bolt, I accomplish very beneficial results, as will Fig. 1, and in Fig. 3, where the bolt is T-head may be longitudinal relative to the lug, in effect passing through only the base .of the triangle; while in Fig. 4 the bolt, its

T-head also placed longitudinal relative to the lug, passes through thevertical portion of the triangle. is to make what are, in effect, three bolt holes, in fact, a single opening, by slotting through a portion of the base and a portion of the perpendicular, as shown in Fig. 2. When placed as in Figs. 3 and 4, it is only necessary to loosen the nut a, when the lug maybe tipped so as to rest with either its base or the perpendicular on the rim of the traction wheel. It is thus seen that the time and labor required to change from the positions shown in Figs. 3 and 4 is not necessarily great. For light road work the lug shown in position 1 of Fig. 1 is best adapted to the requirements; for soft soil the position shown in 2 of Fig. l is preferable, and in soil still softer the position shown in 3 of Fig. l is preferable. In Fig. 1 the hypotenuse resting upon the rim of the wheel, the lug is not adapted to dig into the surface of roads and injure them. In 2 of Fig. 1, with the perpendicular resting upon the rim of the Wheel, the lug is best adapted for travel over fields, as in plowing, while, when restiug upon the base, as in 3 of Fig. 1, the lug is best adapted for passing over soft plowed ground in case the tractor, to the wheels of which these lugs are especially adapted, is pulling, say, seeders or peg tooth harrows.

While the drawings show a strictly rightangle triangular lug, in section, it is evident that a small departure therefrom may be made without departure from the actual invention here shown and claimed, so long as the prism-like form, or L-shaped section, is maintained. The lugs may extend partly or wholly across the rim of the wheel, as'desired.

turned so that its My preferred form, then,

i cured.-

2. A variable-in-height substantially triangular lug for traction wheels, the sides thereof of unequal width, each of said sides adapted to lie against the rim of the wheel, and the lug there suitably secured.

3. A. substantially triangular lug for traction wheels, the sides thereof of unequal widths, each side adapted to lie upon the rim of the wheel, and means for trans verse securement of the lug thereto, whichever of the sides of the lug may have been chosen as a base.

4. A substantially triangular lug for traction wheels, the sides thereof of unequal widths, each side adapted to lie upon the rim of the wheel, and means in common for transverse securement to the rim of the traction wheel rim, said ugs having unequal sides and variable in radial height from the rim of the wheel by means of selective sides provided to serve as bases for securement of the lugs to place.

7. In combinatlon, a substantially triangular lug, a wheel rim, the sides of the lug of differing widths, two or more of the sides of the lug adapted to lie against the rim,

and a bolt, the head of the bolt and the aperture in the lug. so adapted to each other that the bolt may serve to secure the lug to the rim, regardless of which side of the lug may have been selected to serve as a base.

JOHN F. STEWARD.

Witnesses:

D. E. LOOKUT, F. W. HOFFMEISTER.

Copies of this patent may be'obtalned for he cents each, by addressing the Commissioner 0! Patents,

Washington, D. G." 

